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In EMP table, for those emp whose Hiredate is same, update
their sal by "sal+500" or else for others keep the sal as it
is, how to do it by SQL query
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Answer / sanjaygupta1981
UPDATE emp
SET sal=sal+500
WHERE hiredate IN (SELECT hiredate
FROM employees
HAVING COUNT(*)>1
GROUP BY hiredate)
The above query will update the records of all those employees
whose hiredate is same.
| Is This Answer Correct ? | 17 Yes | 5 No |
Hi Sanjay,
the query u posted is a bit wrong,1st u have to do group by
n then having clause comes n not vise versa. so the final
query will be as below:
UPDATE emp
SET sal=sal+500
WHERE hiredate IN (SELECT hiredate
FROM employees
GROUP BY hiredate
HAVING COUNT(hiredate)>1
)
Hi Srinu,
It doesn't matter whether u write count(*) or
count(hiredate),the answer will always the same but its
better to give count(hiredate) only as it is easier to
understand.
| Is This Answer Correct ? | 6 Yes | 2 No |
Hi Srinu,
you check the query once again..Query is not wrong..
UPDATE emp
SET sal=sal+500
WHERE hiredate IN (SELECT hiredate
FROM emp
HAVING COUNT(*)>1
GROUP BY hiredate
it'll give the same result whether we write count(*) or
count(hiredate)..
But I agree but its better to give count(hiredate)instead of
COUNT(*)...coz it is easier to understand.
| Is This Answer Correct ? | 2 Yes | 1 No |
Answer / guest
update emp a set a.sal=a.sal+500 where a.hiredate in(select
max(b.hiredate) from emp b group by b.hiredate having
count(b.hiredate)>1);
or
update emp a set a.sal=a.sal+500 where a.hiredate=(select
max(b.hiredate) from emp b where a.hiredate=b.hiredate group
by b.hiredate having count(b.hiredate)>1);
| Is This Answer Correct ? | 1 Yes | 0 No |
Answer / sukanta
update emp a set a.sal=a.sal+500 where a.hiredate in(select
max(b.hiredate) from emp b group by b.hiredate having
count(b.hiredate)>1);
or
update emp a set a.sal=a.sal+500 where a.hiredate=(select
max(b.hiredate) from emp b where a.hiredate=b.hiredate group
by b.hiredate having count(b.hiredate)>1);
above is Posted By
Sukanta
| Is This Answer Correct ? | 0 Yes | 0 No |
Answer / srinivas
Hi suraj no need to put first group by and then having
clause
we can give any order it will work
please check and let me know
| Is This Answer Correct ? | 1 Yes | 2 No |
Answer / sbvp
update emp set sal=sal+500
or
alter table emp modify sal=sal+500
| Is This Answer Correct ? | 1 Yes | 28 No |
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